docs: docker compose bake

content/guides/docker-compose.mdx

@@ -95,3 +95,46 @@ When using `docker compose build` with Depot, there are a few things to be aware
 3. It's not possible to use multiple different Depot projects for different Compose services with `docker compose build`.
 
 However, `depot configure-docker` does directly integrate with any tools that use Docker Buildx, so if you are unable to use `depot bake --load` or otherwise need full Buildx compatibility with other tools, this is a good option.
+
+## Building and testing `docker compose` on GitHub Actions
+
+As we described above, the `depot bake` command can accept a `docker-compose.yml` file and build all services in parallel. However, by default this command will not load the images back into the local Docker daemon, which is necessary for running `docker compose` commands.
+In this example, we demonstrate how to use `depot bake` to build all services defined in a `docker-compose.yml` file, followed by `depot pull` to load the built images into the local Docker daemon. This makes it possible to run `docker compose` commands, such as `docker compose run tests`, as usual. Once the tests pass, you can use depot push to push the images to a registry.
+
+```yaml
+name: Depot example compose
+on: push
+
+permissions:
+  contents: read
+  id-token: write
+  packages: write
+
+jobs:
+  compose-example:
+    runs-on: depot-ubuntu-22.04
+    steps:
+      - uses: actions/checkout@v3
+      - uses: depot/setup-action@v1
+
+      - name: Build, cache, and save all compose images to the depot ephemeral registry.
+        uses: depot/bake-action@v1
+        id: bake
+        with:
+          files: docker-compose.yml
+          save: true
+
+      - name: Pull all compose service images locally from the ephemeral registry.
+        uses: depot/pull-action@v1
+        with:
+          build-id: ${{ steps.bake.outputs.build-id }}
+
+      - name: Run compose up (images should not rebuild)
+        run: |
+          docker compose up
+
+      - name: If successful push the srv1 compose service target image to ghcr.io from ephemeral registry
+        run: |
+          echo ${{ secrets.GITHUB_TOKEN }} | docker login ghcr.io -u $ --password-stdin
+          depot push --target srv1 -t ghcr.io/depot/srv1:latest ${{ steps.build.outputs.build-id }}
+```